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- W2000443397 abstract "This study was undertaken in order to establish the presence of pluripotential neuroblasts in the developing chick CNS. This has been suggested by our previous observations that expression of emerging neuronal phenotypes in the chick embryo CNS is affected by exposure to neurotrophic substances (i.e., GHRH, SRIF, NGF, EGF, muscle-derived factors) or neurotoxins such as ethanol. We have proposed that one mechanism whereby these substances elicit their effects is by shifting phenotypic expression in populations of pluripotential neuroblasts. In order to establish the presence of significant populations of pluripotential neuroblasts, cultures obtained from 3-day-old whole chick embryos (E3WE) were doublestained with antibodies to markers specific for four neuronal phenotypes in various permutations. Cultures at 6 DIV were tested for the presence of tyrosine hydroxylase (TH), choline acetyltransferase (ChAT), γ-aminobutyric acid (GABA), and somatostatin (SRIF) alone, and in various combinations. We observed a colocalization of all phenotypic markers within neuronal perikarya and processes in more than fifty percent of neuronal cells in these cultures. These data suggest that developing neuroblasts at this stage of embryogenesis possess the machinery necessary to adopt multiple neuronal phenotypes. The colocalization of neurotransmitter proteins in early neuroblasts (60 hr of embryogenesis) supports the recent concept that these substances themselves may influence phenotypic expression and also supports our idea that microenvironmental factors (i.e., ethanol, growth factors) provide signals which affect emerging phenotypes. © 1995 Wiley-Liss, Inc." @default.
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- W2000443397 date "1995-08-01" @default.
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- W2000443397 title "Early neuroblasts are pluripotential: Colocalization of neurotransmitter and neuropeptides" @default.
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- W2000443397 doi "https://doi.org/10.1002/jnr.490410516" @default.
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